Time-of-check Time-of-use (TOCTOU) Race Condition

Overview Affected versions of this package are vulnerable to Time-of-check Time-of-use TOCTOU Race Condition via the CommandLinker trust mechanism, where a command-link click triggers a trust dialog and, upon user approval, executes the associated trust command without verifying that the DOM...

Time-of-check Time-of-use (TOCTOU) Race Condition

Overview jupyterlab is a JupyterLab computational environment. Affected versions of this package are vulnerable to Time-of-check Time-of-use TOCTOU Race Condition via the CommandLinker trust mechanism, where a command-link click triggers a trust dialog and, upon user approval, executes the...

Time-of-check Time-of-use (TOCTOU) Race Condition

Overview notebook is a web application that allows you to create and share documents that contain live code, equations, visualizations, and explanatory text. Affected versions of this package are vulnerable to Time-of-check Time-of-use TOCTOU Race Condition via the CommandLinker trust mechanism,...

JupyterLab's command linker attributes in HTML enable one-click command execution from untrusted content

JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all click events on document.body and executes the named command without checking whether the element came from trusted JupyterLab UI. A notebook with ...

PYSEC-2026-2537 JupyterLab's command linker attributes in HTML enable one-click command execution from untrusted content

JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all click events on document.body and executes the named command without checking whether the element came from trusted JupyterLab UI. A notebook with ...

JupyterLab's command linker attributes in HTML enable one-click command execution from untrusted content

JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all click events on document.body and executes the named command without checking whether the element came from trusted JupyterLab UI. A notebook with ...

PT-2026-59329

JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all click events on document.body and executes the named command without checking whether the element came from trusted JupyterLab UI. A notebook with ...

BIT-JUPYTERLAB-2026-42557 jupyterlab: Command linker attributes in HTML enable one-click command execution from untrusted content

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to 4.5.7, JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all cli...

ALPINE-CVE-2026-42557

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to 4.5.7, JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all cli...

CVE-2026-42557

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to 4.5.7, JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all cli...

CVE-2026-42557

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to 4.5.7, JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all cli...

CVE-2026-42557 jupyterlab: Command linker attributes in HTML enable one-click command execution from untrusted content

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to 4.5.7, JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all cli...

CVE-2026-42557

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to 4.5.7, JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all cli...

CVE-2026-42557

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to 4.5.7, JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all cli...

CVE-2026-42557: Improper Neutralization of Input During Web Page Generation

jupyterlab is an extensible environment for interactive and reproducible computing, based on the Jupyter Notebook Architecture. Prior to 4.5.7, JupyterLab's HTML sanitizer allowlists data-commandlinker-command and data-commandlinker-args on button elements, while CommandLinker listens for all cli...

JupyterLab cross-site scripting vulnerability

JupyterLab is an open-source extension designed for interactive and reproducible computing environments, based on the Jupyter Notebook framework. Versions of JupyterLab prior to 4.5.7 contained a cross-site scripting vulnerability. This vulnerability stemmed from the HTML cleaner allowing...

Cross-site Scripting (XSS)

JupyterLab is vulnerable to Cross-site Scripting XSS. The vulnerability is due to insufficient validation of data-commandlinker- attributes in sanitized HTML output, which allows an attacker to craft a malicious notebook containing a deceptive button that executes arbitrary JupyterLab commands,...

Cross-site Scripting (XSS)

Overview @jupyterlab/markdownviewer-extension is a JupyterLab - Markdown Renderer Extension Affected versions of this package are vulnerable to Cross-site Scripting XSS via the handling of data-commandlinker-command and data-commandlinker-args attributes in HTML content. An attacker can execute...

Cross-site Scripting (XSS)

Overview @jupyterlab/rendermime is a JupyterLab - RenderMime Affected versions of this package are vulnerable to Cross-site Scripting XSS via the handling of data-commandlinker-command and data-commandlinker-args attributes in HTML content. An attacker can execute arbitrary commands, including co...

Cross-site Scripting (XSS)

Overview @jupyterlab/rendermime-extension is an A rendermime extension for JupyterLab Affected versions of this package are vulnerable to Cross-site Scripting XSS via the handling of data-commandlinker-command and data-commandlinker-args attributes in HTML content. An attacker can execute arbitra...